Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

DETERMINE IF RELATED TCM POWER INPUT DTCS ARE PRESENT
1. With the scan tool, read Transmission DTCs
  Are any TCM Power Input DTCs present?
  
  Yes
  - Refer to the DTC INDEX - 2500 HD & 3500 HD article and perform the appropriate diagnostic procedure.
  No
  - Go To 2
TRANSMISSION SOLENOID/TRS ASSEMBLY
1. Turn the ignition OFF to the LOCK position.
2. Remove the Starter Relay.
  CAUTION:
  Removal of the Starter Relay will prevent the vehicle from being started in gear.
  
  WARNING:
  The Starter Relay must be removed from the PDC. Failure to do so may result in possible serious or fatal injury.
  
  NOTE:
  Failure to remove the Starter Relay can cause a Transmission - No Response condition.
3. Install (special tool #8333B, Simulator, Transmission).
4. Ignition ON, Engine Not Running.
5. With the scan tool, actuate the MS Solenoid.
6. Monitor the MS Solenoid LED on the Transmission Simulator.
  Did the MS Solenoid LED on the Transmission Simulator blink on and off?
  
  Yes
  - Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 3
TRANSMISSION SOLENOID/TRS ASSEMBLY
1. With the scan tool, continue to actuate the MS Solenoid for the period of two minutes using the Transmission Simulator.
2. After two minutes of actuation, with the scan tool, stop the actuation and check for transmission DTCs.
  Did DTC P2706 reset during the actuation test?
  
  Yes
  - Go To 4
  No
  - Replace the Transmission Solenoid/TRS Assembly in accordance with the Service Information.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 66RFE TRANSMISSION VERIFICATION TEST .
(T140) MS SOLENOID CONTROL CIRCUIT SHORTED TO ANOTHER CIRCUIT

Fig 1: Checking MS Solenoid Control Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition OFF to the LOCK position.
2. Disconnect the (special tool #8333B, Simulator, Transmission).
3. Disconnect the PCM harness connectors.
4. Measure the resistance between the (T140) MS Solenoid Control circuit and all other circuits in the Transmission Solenoid/TRS Assembly harness connector.
  Is the resistance below 5.0 ohms between the (T140) MS Solenoid Control circuit and any other circuit(s) in the Transmission Solenoid/TRS Assembly harness connector?
  
  Yes
  - Repair the (T140) MS Solenoid Control circuit for a short to another circuit(s).
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 5
(T140) MS SOLENOID CONTROL CIRCUIT OPEN

Fig 2: Checking MS Solenoid Control Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Connect the (special tool #8815A, Kit, NGC, 38 Position) to the PCM C4 harness connector.
  CAUTION:
  Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the Miller tool 8815A to perform diagnosis.
2. Measure the resistance of the (T140) MS Solenoid Control circuit between the Transmission Solenoid/TRS Assembly harness connector and the appropriate terminal of the (special tool #8815A, Kit, NGC, 38 Position).
  Is the resistance above 5.0 ohms?
  
  Yes
  - Repair the (T140) MS Solenoid Control circuit for an open.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Go To 6
(T140) MS SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

Fig 3: Checking MS Solenoid Control Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (T140) MS Solenoid Control circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (T140) MS Solenoid Control circuit for a short to ground.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 66RFE TRANSMISSION VERIFICATION TEST .
  No
  - Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the PCM in accordance with the Service Information. With the scan tool, perform a Quick Learn.
  - Perform the 66RFE TRANSMISSION VERIFICATION TEST. Refer to the 66RFE TRANSMISSION VERIFICATION TEST .